Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b33121e656f11dc…

MALICIOUS

PDF

78.5 KB Created: 2021-03-08 17:59:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b0a370886069bc09eda8d690f59dcc87 SHA-1: 3d7d33fce51e4c852cd5de9909efc56da8e59e24 SHA-256: 0b33121e656f11dc2939d265aa14c6ded3b74565182d7dd952e50559234266fc
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm with numerous external PDF links. The primary URL, 'https://soxebez.ru/123?utm_term=link%2527+s+awakening+switch+guide+zelda+dungeon', suggests a potential phishing or SEO manipulation tactic. The document's structure and the high number of outbound links indicate an attempt to redirect users to potentially harmful content or exploit vulnerabilities through linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/123?utm_term=link%2527+s+awakening+switch+guide+zelda+dungeon PDF link annotation
    • http://ruszaimclub.ru/what_are_the_7_ps_of_compartment_syndromedg6aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494451/normal_5fffcffc5d1d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486190/normal_60129fd76dd63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485163/normal_5fe6a0a63e24a.pdfIn PDF document text
    • https://gokalobinure.weebly.com/uploads/1/3/4/8/134861303/9981289.pdfIn PDF document text
    • http://bigchance.pw/sawununuguzon19j1e.pdfIn PDF document text
    • http://rikaxepe.iblogger.org/98206040645.pdfIn PDF document text
    • https://xelegiri.weebly.com/uploads/1/3/4/4/134435730/mekasumu_gemilef_tegijox_kirugapun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462352/normal_602e9abf8be45.pdfIn PDF document text
    • http://osummer.space/report_preuves_brevet_des_collges_2019m5zo6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_f137232578fc458f99206f25fa5f6fe7.pdf?index=trueIn PDF document text
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_f6f93a4b7ee642dba3b99e176b59157b.pdf?index=trueIn PDF document text
    • https://c580675e-8888-491d-8c80-3106eaac86fb.filesusr.com/ugd/c8a981_d24b7ddfbc9e416c96d395413bb73f82.pdf?index=trueIn PDF document text
    • http://nomapalugaji.epizy.com/arcgis_10._5_full_crack_mega.pdfIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_3d46551924db4a1aa73ae7641ba1250f.pdf?index=trueIn PDF document text
    • http://dejelevimira.epizy.com/the_case_of_marbury_v._madison_1803_established_the_principle_that.pdfIn PDF document text
    • https://9a1eab6f-da2d-4a41-99bb-18a59f11b130.filesusr.com/ugd/c2b690_12dc11d12d0d47479640806312057bb7.pdf?index=trueIn PDF document text
    • https://71e5fc8e-cc9a-4633-96c3-2c70acd464d0.filesusr.com/ugd/f08e01_857e8c2f24684abcb6094ff6b390cd0b.pdf?index=trueIn PDF document text
    • https://5ccda086-29c7-4024-8a93-689df1f3b89c.filesusr.com/ugd/ed8107_691bebf0a0cd4814b6357b98c808c88c.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F8 2828 bytes
SHA-256: 2f32373152b86590eb5c993bf8dbb57d20fc33770b92bc1ec6b5fd985d660553
font_01_sfnt_off0000f301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF301 5284 bytes
SHA-256: e279b8e3872d723ab5a9787260d7ed5282678537184f019419acaf15aa332f7f
font_02_sfnt_off00010525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10525 11420 bytes
SHA-256: 74f771ee7909891a6c24eac2b7fee9f5566a9b5014cdf34362d842b3a59323ba